Fisher FSKIF-121AE2-EU Service Manual page 147

2.4.4.5. P6 malfunction
P6
E5 display
Voltage protection of compressor
Check whether the power
voltage is normal.
Yes
Measure whether outdoor
terminal voltage is normal？
Yes
Measure whether the voltage
between L and N is normal？
Yes
Measure whether input voltage
of bridge rectifier is normal？
Yes
Measure whether the voltage
between P and N is normal
refer to the Appendix 3？
Yes
Replace the IPM board, If the IPM board
and main board is in a board, replace the
outdoor main PCB
Electrical Control System
Restart the unit when the power
No
Check the wiring of
No
power wires well or
correctly
Check the wiring of
No L and N well or
correctly
Check the wiring of
No bridge rectifier well
or correctly
Check whether
No
bridge rectifier is
normal
Yes
Replace the PFC module(If has)
No
Check the wiring of
reactor or inductance
Yes
Check whether reactor
Yes
or inductance is normal
supply gets normal
Reconnect it well
Reconnect it well
Reconnect it well
Replace the bridge
No
No
No
Troubleshooting
rectifier
Reconnect the
wiring
Replace reactor or
inductance
143